Calories in Navel Orange. *Percent Daily Values are based on a 2,000 calorie diet. Your daily values may be higher or lower depending on your calorie needs. Some of these foods were entered by users and are subject to error.
Myelination, the process by which glial cells ensheath the axons of neurons in layers of myelin, ensures the rapid conduction of electrical impulses in the nervous system. The formation of myelin sheaths is one of the most spectacular examples of cell-cell interaction and coordination in nature.
Axon Characteristics. Most neurons have only one axon; Transmit information away from the cell body; May or may not have a myelin covering; Axons can range dramatically in size. Some are as short as 0.1 millimeters, while others can over 3 feet long. The myelin surround the neurons protects the axon and aids in the speed of transmission. The myelin sheath is broken up by points known as the nodes of Ranvier or myelin sheath gaps. Electrical impulses are able to jump from one node to the next, which plays a role in speeding up transmission of the signal.